Routines
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E98E: Event Routing
Used by the routine at ChangeRoom.
Input
DE Pointer to a list of action routines
HL Pointer to a list of room IDs
BC The number of items in the lists (they match)
A Room ID for searching
EventRouting E98E PUSH BC Stash the item count on the stack.
E98F CPIR Search for the room ID in the table.
At this point, if the room ID is found, BC contains the index in the table of where it is location.
E991 POP HL Restore the item count into HL from the stack.
E992 RET NZ Return if the room ID wasn't found in the table.
The room ID was found in the table, so jump to the appropriate action.
E993 PUSH DE Load the actions table into IX (using the stack).
E994 POP IX
E996 INC BC Adjust the room index for the sum.
E997 AND A Subtract the room index from the item count.
E998 SBC HL,BC
E99A LD E,L Load the index into E to find the appropriate action routine.
E99B CALL GetTableEntry Call GetTableEntry.
E99E JP (HL) Jump to the action routine held in *HL.
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